The sides and hinged top of the box are going to be rigid, correct? Like plywood or something?

It's going to be loud in there. Shooters should double up their ear protection.

Your muzzle will be out of the box, you pop up out of the box to shoot, the box will be rigid and rock solid. The chain hung support bar will not be rigid, it swings and sways. The lid will be restrained from opening more than about 10-12". You will be forced to crouch, hold lid open with your head (it will be padded) and the support bar for resting rifle fore end on will sway.

Your muzzle will be out of the box, you pop up out of the box to shoot, the box will be rigid and rock solid. The chain hung support bar will not be rigid, it swings and sways. The lid will be restrained from opening more than about 10-12". You will be forced to crouch, hold lid open with your head (it will be padded) and the support bar for resting rifle fore end on will sway.

Good thing Im not shooting the match, or it sounds like I would have been forced to buy a taller bipod

Good thing Im not shooting the match, or it sounds like I would have been forced to buy a taller bipod

Th bipod would have to be almost 4' high to work. The swinging support bar will be just fine, IF you jam yourself against the box lid and push the bar forward with the rifle mag well AND you don't move or wiggle around at all!

I am thinking I would grab the upper front corner of the right-hand box panel with my support hand (left) and support the rifle on my left forearm.

Any reason that wouldn't be allowed? For example, it would put my left hand fingertips outside the box.

You are welcome to grab anything you can, only the ground outside of box is a fault, front, sides and rear. The drawing in course description is not exact, the lid will not be full width and will probably not be full depth either, so you will be stuck in the middle of the box and swaying support bar and forced forward. You might be able to get an elbow on the box top to one side of lid or cross to the opposite side of lid with a hand, but that would leave the fore-end of rifle completely unsupported and then you would be floating the rifle on a pivot point centered behind the receiver, kinda like offhand

Th bipod would have to be almost 4' high to work. The swinging support bar will be just fine, IF you jam yourself against the box lid and push the bar forward with the rifle mag well AND you don't move or wiggle around at all!

There are some good ones for both kneeling and standing, so there are plenty of options

There are some good ones for both kneeling and standing, so there are plenty of options

You have not seen this box, it won't allow you to get far enough back to deploy a bipod no matter how tall the bipod is. The lid will only be large enough to allow your head and support shoulder to pop out and then put the rifle on or just above the support bar. If you deployed a bipod it would have to be on the ground in front of the box and that would be a procedural per shot fired

I have 3 types of bipod myself that range from shorty to tall boy versions that will do just what you are saying, but in this case, the shooting box just won't allow for it. The bipod would have to be mounted at the mag well to be able to be deployed inside the box.

The only way to game this one is through skill and the ability to stabilize with your body and muscle tension to hold the sway bar steady.

You have not seen this box, it won't allow you to get far enough back to deploy a bipod no matter how tall the bipod is. The lid will only be large enough to allow your head and support shoulder to pop out and then put the rifle on or just above the support bar. If you deployed a bipod it would have to be on the ground in front of the box and that would be a procedural per shot fired
I have 3 types of bipod myself that range from shorty to tall boy versions that will do just what you are saying, but in this case, the shooting box just won't allow for it. The bipod would have to be mounted at the mag well to be able to be deployed inside the box.
The only way to game this one is through skill and the ability to stabilize with your body and muscle tension to hold the sway bar steady.

That might do it, but it depends on how long it takes you to get it deployed as to whether it will be worth it. USPSA rules say bipod must be stowed at start and deployed after start. The spike could be considered a rear mounted vertical fore grip so it would have to be rigidly attached to start to comply or it would have to be deployed after start signal.

There ya' go

BTW, the actual constructed dimensions of the box and opening and lid size will not be available to competitors until they are at the match. What is in course description is a pre-construction estimate

That might do it, but it depends on how long it takes you to get it deployed as to whether it will be worth it. USPSA rules say bipod must be stowed at start and deployed after start. The spike could be considered a rear mounted vertical fore grip so it would have to be rigidly attached to start to comply or it would have to be deployed after start signal.

There ya' go

BTW, the actual constructed dimensions of the box and opening and lid size will not be available to competitors until they are at the match. What is in course description is a pre-construction estimate

No worries, the box will not be competitor size discriminatory. It will only matter how well you can stabilize yourself while crouching. There are only five shots to make (if you don't go for the bonus) at 140 yards so it can't be that tough, right